serious answer go to your nearset Nordstroms or Brooks Brothers a specialized assosciate with help you try on a couple tuxedos and determine your best look. If you dont have that kinda paper, than rent a tuxdeo from Mens WearhouseQuick tip: Slim fit tux's are in right now

What I did was just went to my local tuxedo shop, they usually have rental deals going on since it's prom season and whatnot. Just stop in and check out what they have, they usually have manequins wearing the different types of suits and stuff so you don't need to have any prior knowledge of what to ask for before going in. Just peep what you like and then ask to try it on.

No matter what you're going to look good what it really comes down to is if you wanna have some kind of flair with a colorful vest and tie or if you want to go more traditional. Anyway, have fun bro!